Ahmet Çabuk

Ahmet Çabuk
Eskisehir Osmangazi University | ESOGU · Department of Biology

Prof. Dr.

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95
Publications
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Publications

Publications (95)
Conference Paper
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Pseudomonas aeruginosa biyofilmler kateterler, endeskopik cihazlar ve protezlerde kolonize olurlar. Bu nedenle ısıya hassas plastik endeskopik hortumlar içinde oluşabilen P. aeruginosa biyofilmlerin eradikasyonu önemlidir. Soğuk plazmaların biyolojik hücreler üzerinde ısı üretmeden sterilize edici etkisi klasik yöntemlere göre öne çıkmaktadır. Bunu...
Conference Paper
Full-text available
Soğuk plazmalar; biyolojik hücreler ve dokular üzerinde ısı etkisi üretmeden antibakteriyel etkiler oluşturabildiğinden, inaktivasyon ve sterilizasyon amaçları için klasik yöntemlerden farklı yeni bir tekniktir. Soğuk plazmaların ürettiği serbest radikaller (ROS ve RNS), nötr ve yüklü parçacıklar ayrıca UV ışın, ozon ve elektromanyetik alan gibi an...
Article
The depletion of high-grade ore deposits, as well as the generation of large quantities of tailings by mining and metallurgical activities, necessitates an urgent search for not only more cost-effective, but also more eco-friendly methods of recovering minerals from low-grade deposits and secondary resources. Research in the bioflotation process ap...
Article
Bacterial membrane vesicles are cupped-shaped structures formed by bacteria in response to environmental stress, genetic alteration, antibiotic exposure, and others. Due to the structural similarities shared with the producer organism, they can retain certain characteristics like stimulating immune responses. They are also able to carry molecules f...
Article
Changes in the environment in recent years have led to the examination of the role and influence human activities on it. Attempts to quantify the impact of these activities by developing standardized modelling frameworks through Life cycle sustainability assessment is one such approach in the context of sustainability seeking to measure the impact...
Article
Since it can be a source of new microorganisms with biological potential, it is important to identify the microorganisms found in environments with high boron content in terms of ecological and biotechnological application potentials. In this context, deposit waters in environments where boron mining activities perform are important habitats for bo...
Article
Mucor circinelloides isolated from mill scale was magnetized by using the method of co-precipitation under alkaline conditions and this magnetized fungus was utilized efficiently to remove reactive textile dyestuff such as Reactive Orange 13. The value of saturation magnetization was obtained 4.93083 emu/g and Brunauer-Emmett-Teller surface area fo...
Article
Acid mine drainage (AMD) is a wastewater caused by mining activities and sulfide minerals oxidation. It occurs generally as a result of the relation of water, oxygen and microorganisms. In this study, the pH and the temperature of samples were determined around 2 and 20 °C, respectively. The chemical analysis was made by - ICP-MS. Sulfur concentrat...
Article
Full-text available
During 2020, the world has experienced extreme vulnerability in the face of a disease outbreak. The coronavirus disease 2019 (COVID-19) pandemic discovered in China and rapidly spread across the globe, infecting millions, causing hundreds of thousands of deaths, and severe downturns in the economies of countries worldwide. Biosurfactants can play a...
Article
Thermophilic microorganisms are quite attractive for the study of biodiversity and evolutionary process as well as biotechnological applications. These organisms provide significant advantages for industrial and biotechnological processes occurring fast and efficiently at high temperatures. Possible potential also is getting increase thanks to isol...
Article
12 halophilic strains from different hypersaline environments such as solar salterns in Tuzlagozu (Sivas), Fadlum (Sivas), Kemah (Erzincan), a hypersaline spring water in Pulumur (Tunceli) and a saline lake in Delice (Kirikkale) belonging to Turkey, were investigated in terms of levan production. After incubation and ethyl alcohol treatment, dialys...
Article
Microbial diversity, same as mineral deposits has been evaluated to be among the underground riches of a country. New data on microbial diversity are thought to be of potential economic value. Acid drainage waters are characterized by low pH and high concentrations of metals. Therefore, these acidic habitats are perfect places for quantitative and...
Article
Full-text available
In this study, production, optimization and characterization of protease produced by a bacterium isolated from Kırka boron mine distinct were performed. The proteolytic activities of isolates were screened based on Anson method. The optimal production conditions for protease were determined by using Central Composite Design. Bacillus sp. DB14 isola...
Article
Among the thermoplastic elastomers that play important roles in the polymer industry due to their superior properties, styrene‐based species and polyurethane block copolymers are of great interest. Poly(styrene‐ethylene‐butadiene‐styrene) (SEBS) as a triblock copolymer seems to have the potential to meet many demands in different applications due t...
Article
Full-text available
The polymers/enzymes produced by the microorganisms isolated from the various thermal sources have stability at different levels and their usage areas can be improved according to this characteristic. In this study, prokaryotic diversity of water sample taken from Çitgöl thermal spring in Kütahya-Simav, has been investigated by cultivation techniqu...
Article
BACKGROUND In this study, hyaluronic acid production using Streptococcus equi subsp. equi by optimizing through Central Composite experimental design; purification with an alternative extraction method; determination of molecular weight, cytotoxicity, viscosity; H‐NMR and FTIR‐ATR analyses were provided. RESULTS The hyaluronic acid yield obtained...
Article
Coal continues to be a significant source of energy in the world. It is very important to utilize this energy source as much as possible, to operate unutilized loss reserves due to its characteristics. In this context, the necessity to continue studying on clean coal technologies was emphasized in terms of sustainability in energy production and it...
Article
Full-text available
Boron is a vital micronutrient for the growth of plants and different organisms. However, boron may be toxic to living cells at high concentrations. Nevertheless, microorganisms can be grown in harsh conditions such as environments with higher boron concentrations. It is also known that boron‐tolerant microorganisms have significant biotechnologica...
Article
Biological desulphurization is a good option because of simple equipment, easy operation, and low cost advantages. In this study, biodesulphurization of low rank lignites having high ash and sulphur content was investigated through a drum reactor using Alternaria sp. fungus which provided high removal of sulphur at erlen scale in our previous study...
Article
Hyaluronic acid (HA) is a natural biopolymer and has long been attracting the attention of biotechnology industry due to its various biological functions. HA production with natural producer Streptococcus equi subsp. zooepidemicus has not been preferred because it has many drawbacks due to its pathogenicity. Therefore, in the present study, Strepto...
Article
In the present study, culture conditions of Streptococcus equi was optimized through Box–Behnken experimental design for hyaluronic acid production. About 0.87 gL⁻¹ of hyaluronic acid was produced under the determined conditions and optimal conditions were found as 38.42 °C, 24 hr and 250 rpm. The validity and practicability of this statistical opt...
Article
Full-text available
Magnetosomes are specialized organelles arranged in intracellular chains in magnetotactic bacteria. The superparamagnetic property of these magnetite crystals provides potential applications as contrast-enhancing agents for magnetic resonance imaging. In this study, we compared two different nanoparticles that are bacterial magnetosome and HSA-coat...
Article
This study was aimed to assess toxicity of boron mine drainage (BMD) water in Kırka borough of Turkey, which is one of the most important boron deposit sites in the world. Three complementary tests were done to assess the toxicity of BMD water. Root growth inhibition tests showed that EC50 value of BMD water sample was approximately 3.85% of concen...
Article
Full-text available
The phenol degradation capacity of Serratia marcescens NSO9-1 isolated from olive mill wastewater was evaluated and optimized in this study. Plackett-Burman design coupled with Box-Behnken methodology was used to evaluate the effects of medium components and significant parameters on phenol degradation by this relevant strain. According to Plackett...
Article
Rhamnolipid, among the most effective biosurfactants, is a glycolipid‐type biosurfactant primarily produced by Pseudomonas aeruginosa. In this study, rhamnolipid production was carried out using a strain of P. aeruginosa and it is aimed to compare rhamnolipid biopolymers obtained from various extraction methods using glycine (RG), hydrochloric acid...
Article
A multi-responsive microgel having response to pH, temperature, and salt concentration was successfully prepared using a water-soluble monomer. Microgels were readily prepared from 2-(N-morpholino)ethyl methacrylate (MEMA) via emulsion polymerization using glycidyl methacrylate as a comonomer cross-linker. The morpholino groups of MEMA residues of...
Article
A low-temperature flowing postdischarge plasma reactor is first presented. The reactor is a postdischarge chamber coupled to a plasma jet system. The low-pressure flowing postdischarge (jet) in the postdischarge chamber can be generated using direct current (dc) or alternative current (ac) power supplies. A low-pressure plasma jet of Neon using a 2...
Article
Full-text available
In this study, the alkaline protease-production capacity of a Geobacillus subterraneus C2-1 isolate from the Çitgöl thermal spring was investigated and optimised using a Plackett-Burman experimental design. In addition to the incubation time, which was the most important parameter, other significant factors were the peptone, glucose, and MgSO4.7H2O...
Article
Full-text available
Biosorption potential of Talaromayces aculeatus AMDC-14 (KF588645) as low-cost biosorbent for different dyes (Reactive Blue 13, Reactive Blue 72, Reactive Yellow 85 and Reactive Orange 13) removal from aqueous medium was studied. Experiments were performed to determine effect of initial solution pH (1-7), biosorbent dose (0.1-2.5 g L-1), time (15-1...
Article
In this study, first, the physicochemical cleaning of Cayirhan region’s low-quality lignites was investigated by flotation to reduce ash content. In the flotation experiments, the effects of collector dosage, frother dosage, dispersant dosage, pulp density and air flow rate on ash content and combustible recovery in the concentrate fraction were op...
Chapter
Nanotechnology involves the study and use of materials under the 100 nm scale, exploiting the different physiochemical properties exhibited by these materials at the nanoscale level. Microorganisms are the best model and role of action for the nano/biotechnological applications. This technology has become increasingly important for the biotechnolog...
Article
Objective: Biosurfactants are surface-active substances produced by microorganisms. The growth of microorganism supports biosurfactant production on hydrocarbon polluted environments. In this study, the capacity of biosurfactant production of Georgenia daeguensis (accession number, KP798810) isolated from hydrocarbon- contaminated soil was studied....
Article
In this study, acidic textile dyes, including Reactive Blue 13 and Reactive Blue 72, were adsorbed by Penicillium ochrochloron AMDB-12 isolated from acidic mine drainage. Optimal conditions in terms of pH, initial dye concentration, agitation rate, biomass dosage, contact time, and temperature for this process were determined. Biosorption yields fo...
Article
This study concentrates on the reactive biosorption of dyes such as Reactive Red 3:1 (RR3:1), Reactive Orange 13 (RO13), Reactive Blue 13 (RB13), Reactive Blue 72 (RB72). The modified fungal biosorbent, Paecilomyces sp., had a higher dye biosorption yield in our study. 100% of biosorption yield observed on RR3:1 and RB13 and 94.09% of color removal...
Article
The biodiversity of acidophilic prokaryotes in two acidic (pH 2.8-3.05) mine drainage (AMD) sites (Balya and Çan) in Turkey was examined using a combined cultivation-based and cultivation-independent approach. The latter included analyzing microbial diversity using fluorescent in situ hybridization (FISH), terminal restriction enzyme fragment lengt...
Article
Full-text available
The Pb(II) and Ni(II) biosorption of a fungal biomass isolated from mine drainage of metal-processing industries in Balya (BalA +/- kesir province, Turkey) was optimized using a response surface methodology by altering parameters such as pH, initial metal concentration, contact time and biosorbent dosage. This strain was shown to be highly similar...
Article
Full-text available
Heavy metal pollution has become a serious problem for living organisms. In this study, silk fibroin (SF)/nylon-6 nanofiber matrices were formed by electrospinning and their surface was modified with calcium phosphate (CaP) crystals to increase the affinity of divalent heavy metals. The properties of matrices were evaluated as a filter matrix for c...
Article
Full-text available
Magnetically modified Trametes versicolor cells were used for biosorption of Reactive Blue 13 (RB13), Reactive Yellow 85 (RY85) and Reactive Violet 1 (RV1). Percent biosorption values and maximum adsorption capacities of 98.30% and 135.35 mg g−1 for RB13, 96.02% and 125 mg g−1 for RY85, and 98.56% and 227.27 mg g−1 for RV1 were observed under optim...
Article
In this study, we attempted to find an alternative microbial resource as a bioplastic producer. Among all of the isolates, the A1 strain produced 44% poly(b-hydroxybutyrate) (PHB) in proportion to its dry cell weight. The molecular identification of the 16S RNA gene showed that this bacterium was a strain of Bacillus megaterium with the accession n...
Article
Full-text available
Objective: The aim of this study was to investigate the laccase production of Trametes versicolor under submerged fermentation condition. Then, dye decolorization by laccase was optimized using Box-Behnken methodology. Methods: The optimal culture conditions for producing high amount of laccase were determined using Taguchi methodology. The experim...
Article
The biodesulfurization capability of a strain having sulfur and iron metabolism isolated from acidic mine drainage of Balya (Balikesir, Turkey) was studied. Molecular identification of the 16S rRNA gene showed that this bacterium was a strain of Acidithiobacillus ferrivorans. Desulfurization optimization experiments were performed by Taguchi’s meth...
Article
Full-text available
Abstract In this study, protease-producing capacity of Bacillus pumilus D3, isolated from hydrocarbon contaminated soil, was evaluated and optimized. Optimum growing conditions for B. pumilus D3 in terms of protease production were determined as 1% optimum inoculum size, 35 °C temperature, 11 pH and 48 h incubation time, respectively. Stability stu...
Article
Full-text available
Removal of textile dyestuffs from aqueous solution by biosorption onto a dead fungal biomass isolated from acidic mine drainage in the Çanakkale Region of Turkey was investigated. The fungus was found to be a promising biosorbent and identified as Paecilomyces sp. The optimal conditions for bioremediation were as follows: pH, 2.0; initial dyestuff...
Article
Full-text available
Olive oil mill wastewater (OMWW), a recalcitrant pollutant, has features including high phenolic content and dark color; thereby, several chemical or physical treatments or biological processes were not able to remediate it. In this study, the treatment efficiencies of three treatments, including adsorption, biological application, and photo-Fenton...
Article
Full-text available
Chlorinated compounds constitute an important class of xenobiotics. Crude laccase was produced using Trametes versicolor ATCC (200801) in potato dextrose broth, with wheat bran as an inducing medium, and its ability to dechlorinate eight compounds was determined. The compounds were 2-chlorophenol, 4-chlorophenol, 2,4-dichlorophenol, 2,6-dichlorophe...
Article
Full-text available
This study presents Saccharomyces cerevisiae, an alcohol fermentation waste, for removal of acidic dyes (Red 3:1 & Orange 13) even after chemical and physical modification. Biosorption performance was found 96.29% through untreated biomass and 97.31% through pretreated biomass with hydrogen peroxide solution for Red 3:1, whereas 93.49% through untr...
Conference Paper
Plastic, which has many application ranges due to its ease of use, has become a severe environmental problem over time. Alternative processes have been researched to prevent the environmental pollution caused by the oil-based plastic wastes. Therefore, various researches have been carried out on microorganisms producing biodegradable, eco-friendly...
Conference Paper
Amaç: Hidrokarbon kirliliği bulunan bir topraktan izole edilmiş ve biyosürfektan üretim yeteneği olduğu Drop-Collapse yöntemi ile belirlenmiş bir izolatın gereksinim duyduğu optimum besiyeri bileşiminin belirlenmesi çalışmanın amacını oluşturmaktadır. Yöntem ve Gereçler: Eskişehir’de hidrokarbon benzeri bileşiklerce kirlenmiş topraktan alınan bir d...
Article
The Pb(II) and Ni(II) biosorption of a fungal biomass isolated from mine drainage of metal-processing industries in Balya (Balıkesir province, Turkey) was optimized using a response surface methodology by altering parameters such as pH, initial metal concentration, contact time and biosorbent dosage. This strain was shown to be highly similar to Pe...
Article
Full-text available
In this study, decolorization of dyestuffs, such as Reactive Red 198, Rem Blue RR, Dylon Navy 17, Rem Red RR, and Rem Yellow RR was studied using laccase and laccase-mediated system. The laccases are known to have an important potential for remediation of pollutants. Among these dyestuffs, decolorization of Rem Blue RR and Dylon Navy 17 was perform...
Article
Full-text available
Large quantities of dyes used in the textile industry are discharged to recipient environment during manufacture. This situation is beginning of a process which is difficult to recovery and relevant toenvironment and human health. Therefore, pollution of dyestuff produced textile industry will be reduced by cleaning of polluted area and integrating...
Article
In this paper, data obtained during the oxidative desulphurization of some low-rank Turkish lignites with crude laccase enzyme produced from Trametes versicolor ATCC 200801 are presented. In order to optimize desulphurization conditions, effects of incubation time, pulp density, incubation temperature, medium pH, and also lignite source on the desu...